diff options
Diffstat (limited to 'gcc/config/arm/unwind-arm.c')
| -rw-r--r-- | gcc/config/arm/unwind-arm.c | 98 |
1 files changed, 97 insertions, 1 deletions
diff --git a/gcc/config/arm/unwind-arm.c b/gcc/config/arm/unwind-arm.c index 4b75b0fe665..60f61d526f4 100644 --- a/gcc/config/arm/unwind-arm.c +++ b/gcc/config/arm/unwind-arm.c @@ -91,6 +91,16 @@ struct fpa_regs struct fpa_reg f[8]; }; +struct wmmxd_regs +{ + _uw64 wd[16]; +}; + +struct wmmxc_regs +{ + _uw wc[4]; +}; + /* Unwind descriptors. */ typedef struct @@ -123,12 +133,18 @@ typedef struct struct vfp_regs vfp; struct vfpv3_regs vfp_regs_16_to_31; struct fpa_regs fpa; + struct wmmxd_regs wmmxd; + struct wmmxc_regs wmmxc; } phase1_vrs; #define DEMAND_SAVE_VFP 1 /* VFP state has been saved if not set */ #define DEMAND_SAVE_VFP_D 2 /* VFP state is for FLDMD/FSTMD if set */ #define DEMAND_SAVE_VFP_V3 4 /* VFPv3 state for regs 16 .. 31 has been saved if not set */ +#define DEMAND_SAVE_WMMXD 8 /* iWMMXt data registers have been + saved if not set. */ +#define DEMAND_SAVE_WMMXC 16 /* iWMMXt control registers have been + saved if not set. */ /* This must match the structure created by the assembly wrappers. */ typedef struct @@ -157,6 +173,10 @@ void __attribute__((noreturn)) restore_core_regs (struct core_regs *); /* Routines for FLDMX/FSTMX format... */ void __gnu_Unwind_Save_VFP (struct vfp_regs * p); void __gnu_Unwind_Restore_VFP (struct vfp_regs * p); +void __gnu_Unwind_Save_WMMXD (struct wmmxd_regs * p); +void __gnu_Unwind_Restore_WMMXD (struct wmmxd_regs * p); +void __gnu_Unwind_Save_WMMXC (struct wmmxc_regs * p); +void __gnu_Unwind_Restore_WMMXC (struct wmmxc_regs * p); /* ...and those for FLDMD/FSTMD format... */ void __gnu_Unwind_Save_VFP_D (struct vfp_regs * p); @@ -181,6 +201,11 @@ restore_non_core_regs (phase1_vrs * vrs) if ((vrs->demand_save_flags & DEMAND_SAVE_VFP_V3) == 0) __gnu_Unwind_Restore_VFP_D_16_to_31 (&vrs->vfp_regs_16_to_31); + + if ((vrs->demand_save_flags & DEMAND_SAVE_WMMXD) == 0) + __gnu_Unwind_Restore_WMMXD (&vrs->wmmxd); + if ((vrs->demand_save_flags & DEMAND_SAVE_WMMXC) == 0) + __gnu_Unwind_Restore_WMMXC (&vrs->wmmxc); } /* A better way to do this would probably be to compare the absolute address @@ -421,9 +446,80 @@ _Unwind_VRS_Result _Unwind_VRS_Pop (_Unwind_Context *context, return _UVRSR_OK; case _UVRSC_FPA: + return _UVRSR_NOT_IMPLEMENTED; + case _UVRSC_WMMXD: + { + _uw start = discriminator >> 16; + _uw count = discriminator & 0xffff; + struct wmmxd_regs tmp; + _uw *sp; + _uw *dest; + + if ((representation != _UVRSD_UINT64) || start + count > 16) + return _UVRSR_FAILED; + + if (vrs->demand_save_flags & DEMAND_SAVE_WMMXD) + { + /* Demand-save resisters for stage1. */ + vrs->demand_save_flags &= ~DEMAND_SAVE_WMMXD; + __gnu_Unwind_Save_WMMXD (&vrs->wmmxd); + } + + /* Restore the registers from the stack. Do this by saving the + current WMMXD registers to a memory area, moving the in-memory + values into that area, and restoring from the whole area. */ + __gnu_Unwind_Save_WMMXD (&tmp); + + /* The stack address is only guaranteed to be word aligned, so + we can't use doubleword copies. */ + sp = (_uw *) vrs->core.r[R_SP]; + dest = (_uw *) &tmp.wd[start]; + count *= 2; + while (count--) + *(dest++) = *(sp++); + + /* Set the new stack pointer. */ + vrs->core.r[R_SP] = (_uw) sp; + + /* Reload the registers. */ + __gnu_Unwind_Restore_WMMXD (&tmp); + } + return _UVRSR_OK; + case _UVRSC_WMMXC: - return _UVRSR_NOT_IMPLEMENTED; + { + int i; + struct wmmxc_regs tmp; + _uw *sp; + + if ((representation != _UVRSD_UINT32) || discriminator > 16) + return _UVRSR_FAILED; + + if (vrs->demand_save_flags & DEMAND_SAVE_WMMXC) + { + /* Demand-save resisters for stage1. */ + vrs->demand_save_flags &= ~DEMAND_SAVE_WMMXC; + __gnu_Unwind_Save_WMMXC (&vrs->wmmxc); + } + + /* Restore the registers from the stack. Do this by saving the + current WMMXC registers to a memory area, moving the in-memory + values into that area, and restoring from the whole area. */ + __gnu_Unwind_Save_WMMXC (&tmp); + + sp = (_uw *) vrs->core.r[R_SP]; + for (i = 0; i < 4; i++) + if (discriminator & (1 << i)) + tmp.wc[i] = *(sp++); + + /* Set the new stack pointer. */ + vrs->core.r[R_SP] = (_uw) sp; + + /* Reload the registers. */ + __gnu_Unwind_Restore_WMMXC (&tmp); + } + return _UVRSR_OK; default: return _UVRSR_FAILED; |